Signs of pregnancy?

So i am on b/c but i missed a couple of pills last month, i had my period but it was shorter than usual, then last week i kept getting really dizzy(abnormal for me), was very queasy and my were very sore and swollen, also very crampy in my lower abdomen. My period was 3 days late this month but is also very light and not like usual.....just wondering if anyone else has had this same thing happen.... i have not taken a test because my period later than expected.